Stackable rack and method of using the same

ABSTRACT

A stackable rack includes a bottom rack frame; a top rack frame; a locking assembly that connects with the bottom rack frame and the top rack frame; wherein the bottom rack frame comprises a main supporting frame, at least one first supporting frame rotatably coupled with the main supporting frame and supported on a ground, and a second supporting frame having a securing assembly being coupled with the first supporting frame and rotatably coupled with the main supporting frame; wherein the securing assembly comprises at least one locking bracket with a locking cavity being engaged with the first supporting frame.

FIELD OF THE DISCLOSURE

The present disclosure relates to a rack, and more particularly, astackable rack and method of using the same. Particularly, the stackablerack comprises a top rack frame which enables it to be secured on abottom rack frame.

BACKGROUND OF THE DISCLOSURE

Generally, many forms of racks, stands, shelves, and other such supportstructures, hereinafter referred to simply as “racks,” have been usedfor holding articles. The conventional portable racks which are foldablehave been widely provided in the current market. For example, theconventional portable racks may be collapsed, folded, or dismantled whennot in use, primarily to reduce the space needed to transport emptyracks back to their point of origin.

Another general improvement has been provided for the conventionalportable racks that are configured to be able to stack vertically on topof other similar racks to utilize space in storage and transportationcircumstances. However, the current stackable table may provide designsto secure the two similar racks with one another, but current designsmay not be desirable for situations in which quick and safe removal ofthe rack. In addition, disaggregating rack components may cause a safetyhazard if not secured properly in and around assembly line areas.Furthermore, separable components generally result in much longerbreakdown times for racks.

To overcome this known problem, past solutions have involved varioushinge or bearing mechanisms that have been used to enable the folding ofleg or frame structures relative to the rack surface or base. It hasalso been recognized that it is desirous for safety and conveniencereasons to avoid bearing designs in which components protrude from thejointed areas which may, in turn, catch on clothing, machinery, or thearticles or parts themselves. To avoid such issues, some designs haveutilized a leg or post configuration wherein the leg or support postsslide into or around another structural component of the rack. Thesedesigns have often suffered from shaky stability due to loose-fittingparts. Various elaborate mating cuts and welded components have beenintroduced to increase the strength and stability of suchconfigurations, but at the cost of increased production difficulty,expense, and complication, and often introduce disadvantages such asprotruding components that are undesirable for the reasons mentionedabove.

All referenced patents, applications, and literature are incorporatedherein by reference in their entirety. Furthermore, where a definitionor use of a term in a reference, which is incorporated by referenceherein, is inconsistent or contrary to the definition of that termprovided herein, the definition of that term provided herein applies andthe definition of that term in the reference does not apply. Thedisclosed embodiments may seek to satisfy one or more of theabove-mentioned desires. Although the present embodiments may obviateone or more of the above-mentioned desires, it should be understood thatsome aspects of the embodiments might not necessarily obviate them.

BRIEF SUMMARY OF THE DISCLOSURE

In a general implementation, a stackable rack comprises a bottom rackframe; a top rack frame having a locking assembly that connects with thebottom rack frame; wherein the bottom rack frame comprises a mainsupporting frame, at least one first supporting frame rotatably coupledwith the main supporting frame and supported on a ground, and a secondsupporting frame having a securing assembly being coupled with the firstsupporting frame and rotatably coupled with the main supporting frame;wherein the securing assembly comprises at least one locking bracketwith a locking cavity being engaged with the first supporting frame.

In another aspect combinable with the general implementation, the toprack frame is positioned above the main supporting frame.

In another aspect combinable with the general implementation, the toprack frame comprises a top locking frame being coupled with the mainsupporting frame of the bottom rack frame through the locking assembly.

In another aspect combinable with the general implementation, thelocking assembly comprises a bottom retainer having a bottom screw holearranged on the bottom rack frame, a top screw hole formed on a toplocking frame of the top rack frame, and a first fastener engaged withthe bottom screw hole and the top screw hole.

In another aspect combinable with the general implementation, the secondsupporting frame is vertically arranged between a pair of the firstsupporting frames.

In another aspect combinable with the general implementation, thelocking brackets are affixed on free ends of the second supportingframe.

In another aspect combinable with the general implementation, thelocking bracket is a U-shaped bracket with the locking cavity beingfaced to the first supporting frame.

In another aspect combinable with the general implementation, thesecuring assembly comprises a through-hole formed on the locking bracketand a second fastener being passed through the through-hole and thefirst supporting frame to secure the second supporting frame beingcoupled with the first supporting frame.

In another aspect combinable with the general implementation, the secondsupporting frame is rotatably coupled with the main supporting framethrough a middle supporting frame.

In another aspect combinable with the general implementation, the secondsupporting frame is rotated towards the first supporting frame to insertthe first supporting frame into the locking cavity.

In another aspect combinable with the general implementation, the bottomrack frame further comprises a bottom locking frame positioned between apair of the first supporting frames.

In another aspect combinable with the general implementation, thesecuring assembly comprises a pair of locking brackets, one of thelocking brackets being affixed on one side of the second supportingframe and the other one of the locking brackets being affixed on anopposite side of the second supporting frame.

In another aspect combinable with the general implementation, the bottomrack frame is supported on the ground with the top rack frame beingplaced on the bottom rack frame.

Among the many possible implementations of a method of forming astackable rack comprising:

providing a bottom rack frame comprising a main supporting frame, atleast one first supporting frame rotatably coupled with the mainsupporting frame and a second supporting frame having a securingassembly being coupled with the first supporting frame and verticallyarranged between a pair of the first supporting frames;

rotating the first supporting frame with the main supporting frametowards the second supporting frame;

rotating the second supporting frame with the main supporting frametowards the first supporting frame;

engaging the first supporting frame with a locking cavity formed on alocking bracket of the securing assembly; and

coupling the top rack frame on the bottom rack frame by the lockingassembly.

Further, it is contemplated that the method further comprises:

providing a top locking frame of the top rack frame being coupled withthe main supporting frame of the bottom rack frame.

In the alternative, the method further comprises:

providing a bottom retainer having a bottom screw hole arranged on thebottom rack frame and a top screw hole formed on a top locking frame ofthe top rack frame; and

engaging a first fastener with the bottom screw hole and the top screwhole.

It is still further contemplated that the method further comprises:supporting the top rack frame on the ground by the first supportingframe and the second supporting frame; and

placing the top rack frame on the main supporting frame of the bottomrack frame.

In one embodiment, the method further comprises: providing athrough-hole formed on the locking bracket and a second fastener beingpassed through the through-hole and the first supporting frame to securethe second supporting frame being coupled with the first supportingframe.

In still one embodiment, the securing assembly comprises a pair oflocking brackets, one of the locking brackets being affixed on one sideof the second supporting frame and the other one of the locking bracketsbeing affixed on an opposite side of the second supporting frame.

While this specification contains many specific implementation details,these should not be construed as limitations on the scope of anyinventions or of what may be claimed, but rather as descriptions offeatures specific to particular implementations of particularinventions. Certain features that are described in this specification inthe context of separate implementations can also be implemented incombination in a single implementation. Conversely, various featuresthat are described in the context of a single implementation can also beimplemented in multiple implementations separately or in any suitablesubcombination. Moreover, although features may be described above andbelow as acting in certain combinations and even initially claimed assuch, one or more features from a claimed combination can in some casesbe excised from the combination, and the claimed combination may bedirected to a subcombination or variation of a subcombination.

A number of implementations have been described. Nevertheless, it willbe understood that various modifications may be made without departingfrom the spirit and scope of the disclosure. For example, exampleoperations, methods, or processes described herein may include moresteps or fewer steps than those described. Further, the steps in suchexample operations, methods, or processes may be performed in differentsuccessions than that described or illustrated in the figures.Accordingly, other implementations are within the scope of the followingclaims.

The details of one or more implementations of the subject matterdescribed in this disclosure are set forth in the accompanying drawingsand the description below. Other features, aspects, and advantages ofthe subject matter will become apparent from the description, thedrawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

It should be noted that the drawing figures may be in simplified formand might not be to precise scale. In reference to the disclosureherein, for purposes of convenience and clarity only, directional termssuch as top, bottom, left, right, up, down, over, above, below, beneath,rear, front, distal, and proximal are used with respect to theaccompanying drawings. Such directional terms should not be construed tolimit the scope of the embodiment in any manner.

FIG. 1 is a perspective view of a stackable rack according to an aspectof the embodiments.

FIG. 2 is an exploded view of the stackable rack according to an aspectof the embodiments.

FIG. 3A is a side view of a second supporting frame according to anaspect of the embodiments.

FIG. 3B is an exploded view of the second supporting frame according toan aspect of the embodiments.

FIG. 4 is a perspective view of a bottom rack frame of the stackablerack according to an aspect of the invention.

FIGS. 5A-5D are perspective views of the stackable rack showing a toprack frame performing from a storage position to an opened position, andin the opened position, the top rack frame being placed on the bottomrack frame.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The different aspects of the various embodiments can now be betterunderstood by turning to the following detailed description of theembodiments, which are presented as illustrated examples of theembodiments defined in the claims. It is expressly understood that theembodiments as defined by the claims may be broader than the illustratedembodiments described below.

The term “a” or “an” entity refers to one or more of that entity. Assuch, the terms “a” (or “an”), “one or more” and “at least one” can beused interchangeably herein. It is also to be noted that the terms“comprising,” “including,” and “having” can be used interchangeably.

It shall be understood that the term “means,” as used herein, shall begiven its broadest possible interpretation in accordance with 35 U.S.C.,Section 112(f). Accordingly, a claim incorporating the term “means”shall cover all structures, materials, or acts set forth herein, and allof the equivalents thereof. Further, the structures, materials, or actsand the equivalents thereof shall include all those described in thesummary of the invention, brief description of the drawings, detaileddescription, abstract, and claims themselves.

Unless defined otherwise, all technical and position terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which the invention pertains. Although many methods andmaterials similar, modified, or equivalent to those described herein canbe used in the practice of the present invention without undueexperimentation, the preferred materials and methods are describedherein. In describing and claiming the present invention, the followingterminology will be used in accordance with the definitions set outbelow.

FIG. 1 generally depicts a stackable rack 100 according to an aspect ofthe embodiments.

Referring to FIG. 1 , the stackable rack 100 comprises a bottom rackframe 20 and a top rack frame 10 supported on the bottom rack frame 20.

In some embodiments, the stackable frame 100 may further comprise alocking assembly 30 which may be utilized to connect the top rack frame10 with the bottom rack frame 20. For one example, the top rack frame 10may be positioned above a main supporting frame 21 of the bottom rackframe 20 and may be locked on the bottom rack frame 20 through thelocking assembly 30. It should be noted that, in some embodiments, thebottom rack frame 20 may be supported on a ground 50 with the top rackframe 10 being placed on the bottom rack frame 20.

In some embodiments, the bottom rack frame 20 may comprise the mainsupporting frame 21, at least one first supporting frame 22 rotatablycoupled with the main supporting frame 21, and a second supporting frame23 rotatably coupled with the main supporting frame 21 through a middlesupporting frame 24. For one example, the bottom rack frame 20 maycomprise two pairs of first supporting frames 22 rotatably coupled withthe main supporting frame 21.

In some embodiments, the first supporting frame 22 may comprise a topend 221 rotatably coupled with a bottom side of the main supportingframe 21, and a bottom end 222 being supported on the ground 50. For oneexample, the second supporting frame 23 may be supported between a pairof the first supporting frames 22A, 22C by a securing assembly 25. Foranother example, the second supporting frame 23 may be verticallyarranged between the pair of the first supporting frames 22A, 22C. Forstill another example, the middle supporting frame 24 may be rotatablycoupled with the main supporting frame 21.

As shown in further details in FIG. 1 , the top rack frame 10 maycomprise a top locking frame 11 being coupled with the main supportingframe 21 of the bottom rack frame 20 through the locking assembly 30.

In some embodiments, the top rack frame 10 may further comprise at leastone first-top supporting frame 12 where the top locking frame 11 arecoupled therewith. For one example, the top locking frame 11 may bearranged between a pair of the first-top supporting frames 12. Foranother example, the top locking frame 11 may be vertically arrangedwith the first-top supporting frames 12.

It should be noted that, in one embodiment, the first-top supportingframe 12 may comprise a first top end 121 rotatably coupled with a firstmain supporting frame 13 and a first bottom end 122 opposite of thefirst top end 121, wherein the top locking frame 11 may be arrangedadjacent to the first bottom end 122 of the first-top supporting frame12. In another embodiment, the top locking frame 11 may be verticallyarranged with the first bottom end 122 of the first-top supporting frame12.

FIGS. 2-3B generally depict exploded views of the bottom rack frame 20of a stackable rack according to an aspect of the embodiments.

Referring to FIG. 2 , the securing assembly 25 may further comprise atleast one locking bracket 251 configured to engage with the firstsupporting frame 22, wherein the locking bracket 251 may have a lockingcavity 252 being engaged with the first supporting frame 22.

In some embodiments, the locking bracket may be affixed on a free end ofthe second supporting frame 23. For one example, referring to details ofFIG. 3A, the securing assembly may further comprise a pair of lockingbrackets 251A, 251B affixed on the two free ends, including a first freeend and a second free end of the second supporting frame 23, wherein oneof the pair of the locking brackets 251A may be affixed on the firstfree end of the second supporting frame 23 and the other one of the pairof the locking brackets 251B may be affixed on the second free end ofthe second supporting frame 23.

In some embodiments, the locking bracket 251 may be a U-shaped bracketwith the locking cavity 252 being faced to the first supporting frame22. The middle supporting frame 24 of the bottom rack frame 20 may bevertically arranged with the second supporting frame 23, wherein themiddle supporting fame 24 may be rotatably coupled with the mainsupporting frame 21, as shown in FIG. 2 .

Turning now to FIG. 1 and FIG. 2 , the locking assembly 30 may comprisea bottom retainer 31 arranged on the main supporting frame 21 of thebottom rack frame 20, wherein the bottom retainer 31 may comprise abottom screw hole 310 arranged on the bottom rack frame 20. The lockingassembly 30 may further comprise a top screw hole 320 formed on the toplocking frame 11 of the top rack frame 10, and a first fastener 330engaged with the bottom screw hole 310 of the bottom retainer 31 and thetop screw hole 320 formed on the top locking frame 11, and in such amanner, the top locking frame 11 of the top rack frame 10 may be affixedon the main supporting frame 21 of the bottom rack frame 20, to connectthe top rack frame 10 with the bottom rack frame 20.

Referring to FIG. 3B, in some embodiments, the second supporting frame23 may further comprise a first free end 231 and a second free end 232opposite of the first free end 231, wherein the first free end 231 andthe second free end 232 may be vertically and integrally extended from afront side end 233.

In some embodiments, the one of the pair of the locking brackets 251Amay be affixed on the first free end 231 of the second supporting frame23, and the other one of the pair of the locking brackets 251B may beaffixed on the second free end 232 of the second supporting frame 23.

Continuing to FIG. 3B, for still another example, the middle supportingframe 24 may comprise a top middle end 241 (see FIG. 2 ) rotatablycoupled with the main supporting frame 21, and a bottom middle end 242being affixed on the front side end 233 of the second supporting frame23.

In some embodiments, the securing assembly 25 may comprise athrough-hole 253 formed on the locking bracket 251 and a second fastener254 being passed through the through-hole 253 and the first supportingframe 22 to secure the second supporting frame 23 being coupled with thefirst supporting frame 22, as shown in FIG. 2 and FIG. 3B.

In some embodiments, the securing assembly 25 may further comprise apair of locking brackets, including a first locking bracket 251A and asecond locking bracket 251B, wherein the first locking bracket 251A maybe affixed on the first free end 231 of the second supporting frame 23and the second locking bracket 251B may be affixed on the second freeend 232 of the second supporting frame 23.

The first locking bracket 251A of FIG. 3A to FIG. 3B may comprise afirst affixed side affixed with the first free end 231 of the secondsupporting frame 23, and a first free side opposite of the first affixedside, wherein the first free side may comprise a first through-hole2511A. It should be noted that, in some embodiments, the first lockingbracket 251A may further comprise a first middle side integrallyextended between the first affixed side and the first free side.

In some embodiments, the second locking bracket 251B of FIG. 3A to 3Bmay comprise a second affixed side affixed with the second free end 232of the second supporting frame 23 and a second free side opposite of thesecond affixed side, wherein the second free side may comprise a secondthrough-hole 2511B (see FIG. 5C). It should be noted that, in someembodiments, the second locking bracket 251B may further comprise asecond middle side integrally extended between the second affixed sideand the second free side.

From the above descriptions, in some embodiments, the first lockingbracket 251A and the second locking bracket 251B may be both U-shapedbrackets, wherein the first locking bracket 251A may comprise a firstlocking cavity 252A formed between the first affixed side and the firstfree side, wherein the second locking bracket 251B may comprise a secondlocking cavity 252B formed between the second affixed side and thesecond free side.

FIG. 4 generally depicts a view of the bottom rack frame 20 according toan aspect of the embodiments.

As shown in further details in FIGS. 2 and 4 , the second supportingframe 23 may be rotated towards the first supporting frame 23 to insertthe first supporting frame 22 into the locking cavity 252. In someembodiments, the bottom rack frame 20 may further comprise a bottomlocking frame 26 positioned between a pair of first supporting frames22. In some embodiments, the bottom locking frame 26 may be verticallyarranged with the first supporting frames 22 to support the pair of thefirst supporting frames 22 being positioned in a fixed distance andbeing supported on the ground.

In some embodiments, the main supporting frame 21 may be positionedabove the first supporting frame 22 and the second supporting frame 23.In other words, the main supporting frame 21 may be arranged on the topend 221 of the first supporting frame and the bottom end 222 of thefirst supporting frame may be in contact with the ground.

FIGS. 5A-5D generally depict a method of forming a stackable rackaccording to an aspect of the embodiments.

The contemplated embodiment may include:

providing a bottom rack frame 20 comprising a main supporting frame 21,at least one first supporting frame 22 rotatably coupled with the mainsupporting frame 21 and a second supporting frame 23 having a securingassembly being coupled with the first supporting frame 22, the secondsupporting frame 23 vertically arranged between a pair of the firstsupporting frames 22;

rotating the first supporting frame 22 with the main supporting frame 21towards the second supporting frame 23;

rotating the second supporting frame 23 with the main supporting frame21 towards the first supporting frame 22;

engaging the first supporting frame 22 with a locking cavity 252A(252B)formed on a locking bracket 251A(251B); and

securing the top rack frame 10 on the bottom rack frame 20 by thelocking assembly.

Accordingly, the method may further comprise: providing a top lockingframe 11 of the top rack frame 10 being coupled with the main supportingframe 21 of the bottom rack frame 20 through the locking assembly.

In some embodiments, as shown in FIGS. 5A-5D, the bottom rack frame 20may be folded in a storage position, wherein in the storage position,the first supporting frame 22 and the second supporting frame 23 may beoverlapped with each other to form a planar configuration. For oneexample, the first supporting frame 22 and the second supporting frame23 may be parallelly arranged with the main supporting frame 21.

Accordingly, the method may further comprise: supporting the top rackframe 10 on the ground by the first supporting frame 22 and the secondsupporting frame 23; and

placing the top rack frame 10 on the main supporting frame 21 of thebottom rack frame 20.

As shown further details in FIG. 5D, the first supporting frames 22 maybe supported on the ground with the second supporting frame 23 beingsupporting between a pair of the first supporting frames 22 to affix thepair of the first supporting frame 22 in a fixed distance.

Accordingly, the method may further comprise:

providing a bottom retainer 31 having a bottom screw hole 310 arrangedon the bottom rack frame 20, a top screw hole 320 formed on a toplocking frame 11 of the top rack frame, as shown in FIGS. 1-2 ; and

engaging the first fastener 330 with the bottom screw hole and the topscrew hole.

As shown in further details in FIG. 5D, the first fastener 330 may berotated to lock into the bottom screw hole and the top screw hole.

As shown further details in FIG. 5C, the method may further comprise:

providing a through-hole 2511A(2511B) formed on the locking bracket anda second fastener 254 being passed through the through-hole 2511A(2511B)and the first supporting frame 22 to secure the second supporting frame23 being coupled with the first supporting frame.

In some embodiments, the securing assembly may further comprise a pairof locking brackets, including a first locking bracket and a secondlocking bracket, wherein the first locking bracket may be affixed on thefirst free end of the second supporting frame 23 and the second lockingbracket may be affixed on the second free end of the second supportingframe 23.

In some embodiments, the stackable rack may include a pair of the firstsupporting frames 22, wherein one of the pair of the first supportingframes 22 may be rotated towards one direction, and the other one of thepair of the first supporting frames 22 may be rotated towards anopposite direction. The one direction is opposite of the oppositedirection. In other words, the one of the pair of the first supportingframes 22 may be rotated towards the other one of the pair of the firstsupporting frames 22 to perform the bottom rack being in an openedposition.

Similarly, while operations and/or methods may be depicted in thedrawings in a particular order, this should not be understood asrequiring that such operations be performed in the particular ordershown or in sequential order, or that all illustrated operations and/ormethod steps be performed, to achieve desirable results. In certaincircumstances, multitasking and parallel processing may be advantageous.

Many alterations and modifications may be made by those having ordinaryskill in the art without departing from the spirit and scope of thedisclosed embodiments. Therefore, it must be understood that theillustrated embodiments have been set forth only for the purposes ofexample and that it should not be taken as limiting the embodiments asdefined by the following claims. For example, notwithstanding the factthat the elements of a claim are set forth below in a certaincombination, it must be expressly understood that the embodimentincludes other combinations of fewer, more, or different elements, whichare disclosed herein even when not initially claimed in suchcombinations.

Thus, specific embodiments and applications of stackable rack and methodof using the same have been disclosed. It should be apparent, however,to those skilled in the art that many more modifications besides thosealready described are possible without departing from the disclosedconcepts herein. The disclosed embodiments, therefore, is not to berestricted except in the spirit of the appended claims. Moreover, ininterpreting both the specification and the claims, all terms should beinterpreted in the broadest possible manner consistent with the context.In particular, the terms “comprises” and “comprising” should beinterpreted as referring to elements, components, or steps in anon-exclusive manner, indicating that the referenced elements,components, or steps may be present, or utilized, or combined with otherelements, components, or steps that are not expressly referenced.Insubstantial changes from the claimed subject matter as viewed by aperson with ordinary skill in the art, now known or later devised, areexpressly contemplated as being equivalent within the scope of theclaims. Therefore, obvious substitutions now or later known to one withordinary skill in the art are defined to be within the scope of thedefined elements. The claims are thus to be understood to include whatis specifically illustrated and described above, what is conceptuallyequivalent, what can be obviously substituted and also what essentiallyincorporates the essential idea of the embodiments. In addition, wherethe specification and claims refer to at least one of something selectedfrom the group consisting of A, B, C . . . and N, the text should beinterpreted as requiring at least one element from the group whichincludes N, not A plus N, or B plus N, etc.

The words used in this specification to describe the various embodimentsare to be understood not only in the sense of their commonly definedmeanings, but to include by special definition in this specificationstructure, material or acts beyond the scope of the commonly definedmeanings. Thus, if an element can be understood in the context of thisspecification as including more than one meaning, then its use in aclaim must be understood as being generic to all possible meaningssupported by the specification and by the word itself.

The definitions of the words or elements of the following claimstherefore include not only the combination of elements which areliterally set forth, but all equivalent structure, material or acts forperforming substantially the same function in substantially the same wayto obtain substantially the same result. In this sense it is thereforecontemplated that an equivalent substitution of two or more elements maybe made for any one of the elements in the claims below or that a singleelement may be substituted for two or more elements in a claim. Althoughelements may be described above as acting in certain combinations andeven initially claimed as such, it is to be expressly understood thatone or more elements from a claimed combination can in some cases beexcised from the combination and that the claimed combination may bedirected to a subcombination or variation of a subcombination.

What is claimed is:
 1. A stackable rack, comprising: a bottom rackframe; a top rack frame; a locking assembly that connects the bottomrack frame with the top rack frame; wherein the bottom rack framecomprises a main supporting frame, at least one first supporting framerotatably coupled with the main supporting frame and supported on aground, and a second supporting frame rotatably coupled with the mainsupporting frame and having a securing assembly being coupled with thefirst supporting frame; wherein the securing assembly comprises at leastone locking bracket with a locking cavity being engaged with the firstsupporting frame.
 2. The stackable rack of claim 1, wherein the top rackframe is positioned on the main supporting frame.
 3. The stackable rackof claim 1, wherein the top rack frame comprises a top locking framebeing coupled with the main supporting frame of the bottom rack framethrough the locking assembly.
 4. The stackable rack of claim 1, whereinthe locking assembly comprises a bottom retainer having a bottom screwhole arranged on the bottom rack frame, a top screw hole formed on a toplocking frame of the top rack frame, and a first fastener engaged withthe bottom screw hole and the top screw hole.
 5. The stackable rack ofclaim 1, wherein the second supporting frame is vertically arrangedbetween a pair of the first supporting frames.
 6. The stackable rack ofclaim 1, wherein the locking brackets are affixed on free ends of thesecond supporting frame.
 7. The stackable rack of claim 1, wherein thelocking bracket is a U-shaped bracket with the locking cavity beingfaced to the first supporting frame.
 8. The stackable rack of claim 1,wherein the securing assembly comprises a through-hole formed on thelocking bracket and a second fastener being passed through thethrough-hole and the first supporting frame to secure the secondsupporting frame being coupled with the first supporting frame.
 9. Thestackable rack of claim 1, wherein the second supporting frame isrotatably coupled with the main supporting frame through a middlesupporting frame.
 10. The stackable rack of claim 1, wherein the secondsupporting frame is rotated towards the first supporting frame to insertthe first supporting frame into the locking cavity.
 11. The stackablerack of claim 1, wherein the bottom rack frame further comprises abottom locking frame positioned between a pair of first supportingframes.
 12. The stackable rack of claim 1, wherein the securing assemblycomprises a pair of locking brackets, one of the pair of the lockingbrackets being affixed on one side of the second supporting frame andthe other one of the pair of the locking brackets being affixed on anopposite side of the second supporting frame.
 13. The stackable rack ofclaim 4, wherein the bottom rack frame is supported on the ground withthe top rack frame being placed on the bottom rack frame.
 14. A methodof forming a stackable rack comprising: providing a bottom rack framecomprising a main supporting frame, at least one first supporting framerotatably coupled with the main supporting frame and a second supportingframe; rotating the first supporting frame with the main supportingframe towards the second supporting frame; rotating the secondsupporting frame with the main supporting frame towards the firstsupporting frame; engaging the first supporting frame with a lockingcavity formed on a locking bracket of a securing assembly; and securingthe top rack frame on the bottom rack frame by the locking assembly. 15.The method of claim 14, further comprising: vertically arranging thesecond supporting frame between a pair of the first supporting frames.16. The method of claim 14, comprising: providing a top locking frame ofthe top rack frame being coupled with the main supporting frame of thebottom rack frame.
 17. The method of claim 14, comprising: providing abottom retainer having a bottom screw hole arranged on the bottom rackframe and a top screw hole formed on a top locking frame of the top rackframe; and engaging a first fastener with the bottom screw hole and thetop screw hole.
 18. The method of claim 14, comprising: supporting thetop rack frame on the ground by the first supporting frame and thesecond supporting frame; and placing the top rack frame on the mainsupporting frame of the bottom rack frame.
 19. The method of claim 14,comprising: providing a through-hole formed on the locking bracket and asecond fastener being passed through the through-hole and the firstsupporting frame to secure the second supporting frame being coupledwith the first supporting frame.
 20. The method of claim 14, wherein thesecuring assembly comprises a pair of locking brackets, one of the pairof the locking brackets being affixed on one side of the secondsupporting frame and the other one of the pair of the locking bracketsbeing affixed on an opposite side of the second supporting frame.